When falling from a cliff of at least 13 blocks, the player takes full damage and the boots take no damage. This means that the height table at https://wiki.industrial-craft.net/index.php?title=Rubber_Boots#Technical_Details does not apply, and the advice about using rubber boots to make using an electric jetpack safer is less applicable. Fall distances of 5 to 12 cause zero damage to the player, and 1 to 4 damage to the boots.

Steps To Reproduce

1. Find (or make) a cliff at least 13 blocks high.
2. Put on some rubber boots.
3. Walk off the cliff.
4. Observe the damage to the player and to the boots.

Additional Information

At first, I thought this might have been introduced by the fix to 0002236, but the rubber boots work as expected in 2.6.259 (for 1.10.2, with a fix for that bug), and are broken in 2.8.12 (before that bug was fixed, running in 1.12.2)

The changes vanilla made in 1.9 are staggered over to only apply to Forge mods in 1.11, thus I suspect it's something subtle in how Forge changed armour protection to take into account toughness which has broken the rubber boot's absorption that otherwise hasn't changed. The PR to Forge is here for reference: https://github.com/MinecraftForge/MinecraftForge/pull/3838